diff --git a/homeassistant/components/webostv/media_player.py b/homeassistant/components/webostv/media_player.py
index 239780e3f018..e0520cb7bf57 100644
--- a/homeassistant/components/webostv/media_player.py
+++ b/homeassistant/components/webostv/media_player.py
@@ -68,6 +68,7 @@ SUPPORT_WEBOSTV_VOLUME = (
 
 MIN_TIME_BETWEEN_SCANS = timedelta(seconds=10)
 MIN_TIME_BETWEEN_FORCED_SCANS = timedelta(seconds=1)
+PARALLEL_UPDATES = 0
 SCAN_INTERVAL = timedelta(seconds=10)
 
 
diff --git a/homeassistant/components/webostv/notify.py b/homeassistant/components/webostv/notify.py
index 43320687ce87..e46e3cb202d3 100644
--- a/homeassistant/components/webostv/notify.py
+++ b/homeassistant/components/webostv/notify.py
@@ -16,6 +16,8 @@ from .const import ATTR_CONFIG_ENTRY_ID, DATA_CONFIG_ENTRY, DOMAIN, WEBOSTV_EXCE
 
 _LOGGER = logging.getLogger(__name__)
 
+PARALLEL_UPDATES = 0
+
 
 async def async_get_service(
     hass: HomeAssistant,
diff --git a/homeassistant/components/webostv/quality_scale.yaml b/homeassistant/components/webostv/quality_scale.yaml
index 693cefcdbfc3..9d9b52ab9301 100644
--- a/homeassistant/components/webostv/quality_scale.yaml
+++ b/homeassistant/components/webostv/quality_scale.yaml
@@ -37,7 +37,7 @@ rules:
   entity-unavailable: todo
   integration-owner: done
   log-when-unavailable: todo
-  parallel-updates: todo
+  parallel-updates: done
   reauthentication-flow: done
   test-coverage: todo